. >> law enforcement believed it was used in this way. so the gun would sit in here. >> reporter: there's the title and registration showing it belonged to john muhammad. >> there's kind of creepy items and one of those is that the vehicle was purchased at a place called sure shot auto. >> reporter: a stolen sony laptop covered in residue from evidence testing. >> they used this laptop to plan their attacks. >> reporter: inside were detailed maps and get-away routes. >> they were very planned. >> reporter: the washington sniper shootings killed 10 people. this exhibit will be designed not to glorify crime, but to educate the public. >> this particular collection tells a really unique story and a really complete story about how american law enforcement investigates crimes. >> reporter: and how that work can lead to a conviction in court. >> the good guys won. >> reporter: in maryland, beth parker, fox 5 news. >> coverage of the d.c. sniper attacks continues on our website www.myfoxdc.com. we have a slide show with pictures of muhammad and